[13/16] media: ti-vpe: cal: move code to separate functions

  To make csi2_wait_for_phy() more readable, move code to separate
functions.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
 drivers/media/platform/ti-vpe/cal.c | 38 ++++++++++++++++++++---------
 1 file changed, 26 insertions(+), 12 deletions(-)
  

Hi Tomi,

Thank you for the patch.

On Fri, Mar 13, 2020 at 01:41:18PM +0200, Tomi Valkeinen wrote:
> To make csi2_wait_for_phy() more readable, move code to separate
> functions.
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
>  drivers/media/platform/ti-vpe/cal.c | 38 ++++++++++++++++++++---------
>  1 file changed, 26 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/media/platform/ti-vpe/cal.c b/drivers/media/platform/ti-vpe/cal.c
> index 64ea92dbfac5..319312770eea 100644
> --- a/drivers/media/platform/ti-vpe/cal.c
> +++ b/drivers/media/platform/ti-vpe/cal.c
> @@ -822,20 +822,10 @@ static void csi2_phy_init(struct cal_ctx *ctx)
>  	csi2_cio_pwr(ctx, true);
>  }
>  
> -static void csi2_wait_for_phy(struct cal_ctx *ctx)
> +static void csi2_wait_complexio_reset(struct cal_ctx *ctx)
>  {
>  	int i;

unsigned int ?

>  
> -	/* Steps
> -	 *  2. Wait for completion of reset
> -	 *          Note if the external sensor is not sending byte clock,
> -	 *          the reset will timeout
> -	 *  4.Force FORCERXMODE
> -	 *      G. Wait for all enabled lane to reach stop state
> -	 *      H. Disable pull down using pad control
> -	 */
> -
> -	/* 2. Wait for reset completion */
>  	for (i = 0; i < 250; i++) {
>  		if (reg_read_field(ctx->dev,
>  				   CAL_CSI2_COMPLEXIO_CFG(ctx->csi2_port),
> @@ -854,7 +844,12 @@ static void csi2_wait_for_phy(struct cal_ctx *ctx)
>  			   CAL_CSI2_COMPLEXIO_CFG_RESET_DONE_RESETCOMPLETED)
>  		ctx_err(ctx, "Timeout waiting for Complex IO reset done\n");
>  
> -	/* 4. G. Wait for all enabled lane to reach stop state */
> +}
> +
> +static void csi2_wait_stop_state(struct cal_ctx *ctx)
> +{
> +	int i;

Ditto.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> +
>  	for (i = 0; i < 10; i++) {
>  		if (reg_read_field(ctx->dev,
>  				   CAL_CSI2_TIMING(ctx->csi2_port),
> @@ -866,9 +861,28 @@ static void csi2_wait_for_phy(struct cal_ctx *ctx)
>  		ctx->csi2_port,
>  		reg_read(ctx->dev, CAL_CSI2_TIMING(ctx->csi2_port)),
>  		(i >= 10) ? "(timeout)" : "");
> +
>  	if (reg_read_field(ctx->dev, CAL_CSI2_TIMING(ctx->csi2_port),
>  			   CAL_CSI2_TIMING_FORCE_RX_MODE_IO1_MASK) != 0)
>  		ctx_err(ctx, "Timeout waiting for stop state\n");
> +}
> +
> +static void csi2_wait_for_phy(struct cal_ctx *ctx)
> +{
> +	/* Steps
> +	 *  2. Wait for completion of reset
> +	 *          Note if the external sensor is not sending byte clock,
> +	 *          the reset will timeout
> +	 *  4.Force FORCERXMODE
> +	 *      G. Wait for all enabled lane to reach stop state
> +	 *      H. Disable pull down using pad control
> +	 */
> +
> +	/* 2. Wait for reset completion */
> +	csi2_wait_complexio_reset(ctx);
> +
> +	/* 4. G. Wait for all enabled lane to reach stop state */
> +	csi2_wait_stop_state(ctx);
>  
>  	ctx_dbg(1, ctx, "CSI2_%d_REG1 = 0x%08x (Bit(31,28) should be set!)\n",
>  		(ctx->csi2_port - 1), reg_read(ctx->cc, CAL_CSI2_PHY_REG1));
  

On 16/03/2020 14:41, Laurent Pinchart wrote:
> Hi Tomi,
> 
> Thank you for the patch.
> 
> On Fri, Mar 13, 2020 at 01:41:18PM +0200, Tomi Valkeinen wrote:
>> To make csi2_wait_for_phy() more readable, move code to separate
>> functions.
>>
>> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
>> ---
>>   drivers/media/platform/ti-vpe/cal.c | 38 ++++++++++++++++++++---------
>>   1 file changed, 26 insertions(+), 12 deletions(-)
>>
>> diff --git a/drivers/media/platform/ti-vpe/cal.c b/drivers/media/platform/ti-vpe/cal.c
>> index 64ea92dbfac5..319312770eea 100644
>> --- a/drivers/media/platform/ti-vpe/cal.c
>> +++ b/drivers/media/platform/ti-vpe/cal.c
>> @@ -822,20 +822,10 @@ static void csi2_phy_init(struct cal_ctx *ctx)
>>   	csi2_cio_pwr(ctx, true);
>>   }
>>   
>> -static void csi2_wait_for_phy(struct cal_ctx *ctx)
>> +static void csi2_wait_complexio_reset(struct cal_ctx *ctx)
>>   {
>>   	int i;
> 
> unsigned int ?
> 
>>   
>> -	/* Steps
>> -	 *  2. Wait for completion of reset
>> -	 *          Note if the external sensor is not sending byte clock,
>> -	 *          the reset will timeout
>> -	 *  4.Force FORCERXMODE
>> -	 *      G. Wait for all enabled lane to reach stop state
>> -	 *      H. Disable pull down using pad control
>> -	 */
>> -
>> -	/* 2. Wait for reset completion */
>>   	for (i = 0; i < 250; i++) {
>>   		if (reg_read_field(ctx->dev,
>>   				   CAL_CSI2_COMPLEXIO_CFG(ctx->csi2_port),
>> @@ -854,7 +844,12 @@ static void csi2_wait_for_phy(struct cal_ctx *ctx)
>>   			   CAL_CSI2_COMPLEXIO_CFG_RESET_DONE_RESETCOMPLETED)
>>   		ctx_err(ctx, "Timeout waiting for Complex IO reset done\n");
>>   
>> -	/* 4. G. Wait for all enabled lane to reach stop state */
>> +}
>> +
>> +static void csi2_wait_stop_state(struct cal_ctx *ctx)
>> +{
>> +	int i;
> 
> Ditto.

I'll leave these, as they were "int" also in the original code, and I remove these in the next patches.

  Tomi